I found no solution. I just wanted to air my frustration that CUPS completely ignores the settings I put into /etc/cups/cups-pdf.conf. Hence I can try making better settings all I want, they are completely ignored. If anyone knows a fix, please tell me. I just spend 45 mins on this in vain.

CPUfreq is the part of the Linux kernel that changes your CPU's frequency to save power or increases it to make your system run faster. Obviously the settings you use there are essential for you performance and battery consumption. I read an extensive article by IBM some time ago analysing the different Linux cpu frequency governors. It makes lots of fancy tests and has great diagrams etc. What it boils down to is that these are the perfect setttings for low power at high performance in Linux. (Also check out this article where I tested these settings on my netbook.)

The only app that worked well in my experience was CSIPSimple. And it was easily configured and feature-laden yet small (1.3 MB) and low-resource at the same time. I couldn't get sipdroid or others to run properly.

Questioning the necessity for Wayland and the wiseness of the choice has become a phenomena, especially after Mark Shuttleworth annouced Ubuntu's plans to eventually switch to Wayland. Following I will provide a concise reasoning why we want Wayland. At the end there are some more links for further reading.

In 1984 the MIT started X11.

In 1991, XFree86 started out of the X386 server based on the X11 platform.

In 2003, Xorg took over from XFree86 after a license dispute.

In 2008, Wayland was started to overhaul the entire system and keep only what's necessary for the desktop today, using only today's modern infrastructure in a leightweight architecture.

Learning flash cards with your mobile phone would be great, especially when you're on your way e.g. to work or uni. With OpenCards, there is a great application for that on your Computer. And it's already written in Java (though Openoffice, which it requires, isn't). But then there's already a basic Openoffice Document reader for Android. And they are both Java based and Open Source. Now if only someone would combine the two to have it both working together, that'd be really great...

I've started using Bloggers tag to split up large posts. This means large posts will only show with a few introductionary lines on the front page, for the whole thing you need to click on it: "Read More". I think this makes the front page better suited for its purpose: Providing an overview of current topics. If you are hugely annoyed or positively crazed about this, let me know in the comments and I might reconsider.

Out of some curiosity I recently measured the power usage of my Fritz Box 7570. It's an amazing Linux-powered all-in-one router device with VDSL, VoIP, DECT, USB (e.g. printer or stick) and LAN connectors and VPN and FTPD support. Using VDSL-50 (without its power saving mode), all but one LAN ports off and DECT and Wifi-N active, it uses 9.6 Watts. More than I had been hoping for considering its elaborate power saving modes. Disabling the DECT module takes about 0.05 Watts off of that. Putting the one LAN port into auto-off another 0.05 Watts.

There are a few changes to dbus files so you should best just replace the wpa_supplicant binary in /sbin with your version. Use this .config file to make a binary that works as plug-in replacement with network-manger in Ubuntu and probably Debian as well.